Tension device for self-binding harvesters



(No Model.) 7

M. S. BROWN.

TENSION DEVICE FOR SELF BINDING HA'RVESTERS.

FFICEQ MILES S. BROXVN, OF FOREST HOME, NElV YORK.

TENSION DEVICE FOR SELF-BINDING HARVESTERS.

SFEGIFICATION forming part of Letters Patent No. 450,555, dated April 14, 1891.

Application filed September 6, 1890. Serial No. 364,161. (No model.)

To 60% whom it may concern:

Be it known that I, MILES S. BROWN, acitizen of the United States, residing at Forest Home, in the county of Tompkins and State of New York, have invented certain new and useful Improvements in Tension Devices for Self-Binding Harvesters; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to tension devices for self-binding harvesters to prevent the twine becoming kinked and the feeding of the same too fastto the needle.

It consists, generally, of a pulley suitably hung in a bracket having guiding apertures or eyes for the passage therethrough of the twine and a hinged or pivoted arm adapted to bear against the pulley opposite one end of its axis or journal with greater or less pressure. These and other parts, singly and in combination, and their construction and operation are hereinafter more particularly described and claimed.

My invention is illustrated in the accompanying drawings, in which Figure 1 is a front elevation; Fig. 2, a vertical central section; Fig. 3, a section at right angles to the plane of the section of Fig. 2, and Fig. 4 a side elevation.

Referring to the drawings, A is a bracket or hanger adapted to be secured in position by means of screws or other suitable fastenings passed through apertures a in one side of the bracket and in a projection a thereof and entering the support for said bracket, which may be, and is preferably, the twinebox.

The bracket A consists, in the main, of a right-angled casting A, the longer or vertical portion of which has at about its mid-length a stud or journal I), which bears the periphcry of the pulley B, but does not project at its free end beyond the bore of the pulley. At its lower end the bracket-casting A has an upward and outward inclined plate-like extension b, facing the pulley B, and having at its upper end a bevel-edged aperture or eye If, through which and a second similar aperture or eye b in the shorter portion of the casting A is passed and guided the bindingtwine from the twine-box to the needle.

To the outer end of the shorter portion of the bracket-casting A is hinged or pivoted the vertical arm A at its lower end, the latter preferably being bifurcated or slotted and standing astride of said shorter portion of the casting and a cross-pin 0 being passed through and connecting said parts together. The arm A has its upper inwardly-curved end resting against one side of the pulley B just oppoor axis, but not in contact with the latter, and to this arm upon its outer side is riveted or otherwise firmly held a stiff, preferably platelike, spring 0', whose upper end has an aperture through which passes the threaded portion of a screw-bolt D, engaged by a winged or thumb nut d. The opposite or angular end portion of the screw-bolt D engages or passes through a corresponding opening d in the upper end of the casting A of the bracket A, preventing the bolt from turning as the nut 61 is manipulated to put the pulley under tension.

The pulley B is preferably constructed of two disk sections or halves B B, having each an outer plain surface and an inner peripheral convex surface, the two sections or halves being riveted or bolted together with their providing the peripheral groove for the retention of the twine passing over the same in place thereon. The peripheral convex surfaces of the pulley sections or halves are preferably notched or corrugated, as shown, to permit the ready passage of the knots in the twine without liability of displacement of the twine.

The operation of my invention is obvious, it only being necessary, in order to prevent the feeding of the twine too fast to the needle or binder, to retard the speed of the pulley, which is effected by manipulating the thumb or winged nut so as to cause the pivoted arm to exert the required pressure upon the pulley. By thus effecting the feeding of the twine to the needle or binder it is also apparent that the twine will be subjected to proper tension and be prevented from becoming kinked, as would otherwise be the case.

convexities presented toward each other, thus site its bore-and the free end of its journal Having thus described my invention, What 1. In atension device,the pulley constructed of the two disk-sections B, in combination with a supporting-bracket having a central stud on which said sections are mounted, said bracket having a horizontal arm extending over said pulley, a vertical arm hinged to said horizontal ar1n,the lower end of said vertical arm bearing against one face of said pulley, a spring-arm rigidly secured at one end to said vertical arm,a screw-bolt connecting the opposite end of said spring-arm to the end of said bracket, and a thumb-nut on the end of said screw-bolt for holding said spring-arm onto said bolt and for releasing and tightening the pressure of said spring-arm and said vertical arm against the face of said pulley, substantially as described.

2. The twine-tension device -for harvesterbinders, having its pulley bracket or hanger provided in its shorter-portion at the base of the lower end with a guiding eye or aperture and directly above the latter with an upward and outward inclined plate like extension facing the periphery of the pulley-wheel, having also a guiding eye or aperture, substantially as described.

3. The tension device for harvester-binders, consisting of the bracket or hanger having its longer vertical portion provided with a stud or axis and its shorter lower portion provided with a guiding aperture or eye, and an upward and outward inclined plate-like extension having also a guiding eye or aperture, the pulley hung or journaled upon said stud or axis and in two parts having inner peripheral convex surfaces, the hinged or pivoted arm having its upper curved end resting against said pulley at one side thereof, and the plate-like spring secured to said arm and having extending through its upper end a screw-bolt engaged bya thumb-nut and held in the bracket or hanger, substantially as and for the purpose described.

in testimony whereof I affix my signature in presence of two witnesses.

MILES S. BRGYVN. Witnesses:

ARCHIE O. BURNETT,

A. ELs'roN. 

